Detailed introduction to valve seat and valve body:
1. Relationship between valve seat and valve body
Sealing performance: The cooperation between valve seat and valve body directly affects the sealing performance of valve. Soft sealing valve seat is usually used with metal valve body, while metal sealing valve seat needs to be used with high-strength valve body.
Pressure resistance: The pressure resistance of valve body determines the maximum working pressure of valve, while the sealing performance of valve seat determines the leakage rate of valve under high pressure.
Applicable medium: The material selection of valve seat and valve body needs to be considered comprehensively according to the corrosiveness, temperature, pressure and other characteristics of medium.
1. Valve seat (Seat) The part in the valve that is in direct contact with closing parts such as ball, gate or butterfly plate, responsible for realizing the sealing function.
1.1 Function
Sealing: The valve seat fits tightly with the closing part (such as ball) to prevent medium leakage.
Support: In some valve designs, the valve seat also plays the role of supporting the closing part.
1.2 Type
Fixed valve seat: The valve seat is fixed on the valve body and is suitable for most working conditions.
Floating valve seat: The valve seat can move slightly to adapt to the slight deviation of the closing part and improve the sealing performance.
1.3 Applicable working conditions
Soft sealing valve seat: Applicable to medium and low pressure, medium and low temperature working conditions, especially corrosive media.
Metal sealing valve seat: Applicable to high pressure, high temperature working conditions, and media containing solid particles.
2. The valve body (Body) is the outer shell of the valve, carrying all internal components and connecting the pipeline system.
2.1 Function
Support: The valve body supports internal components such as the valve seat, closing part, and valve stem.
Connection: Connected to the pipeline by flange, thread or welding.
Pressure resistance: The valve body needs to withstand the pressure of the medium to ensure the safe operation of the valve.
2.2 Type
Integrated valve body: The valve body is cast or forged as a whole, with high strength, suitable for high pressure working conditions.
Split valve body: The valve body is assembled from multiple parts, which is convenient for maintenance and replacement of internal parts.
2.3 Applicable working conditions
Metal valve body: Applicable to high pressure, high temperature, and corrosive media.
Non-metallic valve body: suitable for low pressure, low temperature, corrosive media.
Through the above information, you can better understand the function of the valve seat and valve body, material selection and their role in the valve, and ensure that you can correctly select, install and maintain the valve in actual use.
